Not able to make backups of my games...

I have a Softmodded Wii and not sure why but I can't make backup's. I start the back up in USB loader GX and it will run for about 5 to 25 % and then locks up.

I have the same setup on my sister's Wii and it copies just fine. I have boot2 and not sure if this is the issue, I have to run over to her house to copy my games i own to my hard drive ever time I buy a new game and its no fun.